Squarefree.com is a website dedicated to providing tools and resources to enhance web browsing experience and improve online security. Created by Jesse Ruderman, a developer passionate about web standards and usability, the site offers a range of useful tools like JavaScript viewers and debuggers, HTML/XHTML validators, and CSS analyzers. It also provides information on security vulnerabilities in various browsers, helping users stay updated with the latest threats and find appropriate patches. With its user-friendly interface and valuable resources, squarefree.com is an indispensable platform for developers, tech enthusiasts, and anyone seeking to optimize their browsing and protect themselves online.